Officers from Cleveland Police have travelled to Manchester to help with the aftermath of Monday's bombing tragedy.
More than 20 people were killed and dozens more injured when a device was exploded following a concert at the Manchester Arena.
In a statement the force said: “Our condolences are with all those affected by Monday’s shocking attack at the Ariana Grande concert in Manchester which saw many people killed and many more injured.
"Our thoughts remain with their families and friends, as well as with our colleagues from Greater Manchester Police, the local emergency services and other partner organisations in the city.
“Anyone who feels they have been psychologically affected by the events should contact their GP and explain the situation to obtain suitable support.
"Childline also has resources and information to support affected children, at www.childline.org.uk
“In common with several UK forces, Cleveland Police provided practical support last night, with a number of officers deployed to Manchester to assist with what the local police have confirmed they are treating as a terrorist incident.
“We know residents here in Cleveland will inevitably be concerned following these tragic events.
"The national threat level remains at “critical” as it has been for a considerable period of time, meaning an attack is highly likely."
The statement added that the force is calling on residents to contact them if they are suffering from hate crime.
"Our neighbourhood and community engagement officers will continue to work closely with all sections of the public to offer reassurance and to remind them of measures we have in place to help protect them and keep them safe.
“This will include specific measures to protect communities who might feel vulnerable to risk of reprisals.
"Anyone suffering hate-crime is encouraged to report it with the assurance that it will not be tolerated and that every effort will be made to bring offenders to justice.
“Acts of terrorism and hate crimes are committed by a small minority of people and are not representative of our communities.
"This is a time for us all to work closely together and unite against those who seek, through violence and extremism, to intimidate or cause fear.
“Overall we would remind everyone to remain vigilant; and to be alert, not alarmed.
"Suspicious activity should be reported to police via the 101 number or by calling the Anti-Terrorist Hotline on 0800 789 321.”